WEG CFW-09 - Page 216

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CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
Range
[Factory Setting]
Parameter
Unit
Description / Notes
P409
(1)
0.000 to 77.95
Motor Stator Resistance
[ 0.000 ]
(Rs)
0.001

Value estimated by the Self-tuning routine.
-
Run for Tm
- The value of parameter P413 (Mechanical Time Constant
- Tm) is measured with the motor rotating. It shall be run, preferentially,
with the load coupled to the motor.
- Measure Tm
– It estimates only the value of P413 (Mechanical Time
Constant – Tm) with the motor rotating. It shall be run, preferentially, with
the load coupled to the motor.
NOTES!
When P408 = 1 or 2:
The parameter P413 (Mechanical Time Constant – Tm) is set to
an approximated value of the motor mechanical time constant.
The value of this parameter is set based on the motor rotor inertia
(table data is valid for WEG motors), on the Drive Rated Current,
and on the Drive Rated Voltage.
Vector with Encoder Control (P202 = 4):
When P408 is set to option 2 (Run for Imr) and the self-tuning
routine is finished, it is mandatory to couple the load to the motor
and set parameter P408 to 4 (Measure Tm) in order to estimate
P413 (Mechanical Time Constant – Tm). In this case, parameter
P413 will also consider the driven load.
VVW Control - Voltage Vector WEG (P202 = 5):
In the self-tuning routine for the VVW Control, only the mot stator
resistance (P409) is obtained. Therefore, the self-tuning routine
is always run with the motor stationary.
This parame-
ter is shown on the
display(s) only when
P202 = 3, 4 (Vector
Control) a 5 (VVW)